INOR 317 |
| Very recently the dicyanamide ion, N(CN)2-, has been incorporated as a bridging species in various transition metal complexes. Several [Cu2(tren)2(dca)]Y3 dimers, where tren is 2, 2′, 2′′-triaminotriethylamine, dca- is the dicyanamide anion, and Y- is ClO4-, BF4-, PF6-, or BPh4-, have been prepared to study their magnetic exchange pathways. The synthesis, crystal structure, and magnetic properties of [Cu2(tren)2(dca)](BPh4)3 (1) and the monomer [Cu(tren)(dca)](BPh4) (2) are reported and discussed. Complex 1 exhibits weak antiferromagnetic exchange (J = -4 cm-1) whereas complex 2 shows no exchange, thus confirming the dca- bridge as the superexchange pathway in this system. The efficiency of the dca- bridge as a magnetic exchange pathway has become of recent interest in the area of single-molecule magnets (SMMs). Greater chemical control over the magnetic exchange interactions between SMMs could lead to new nanomagnets with attractive physical properties. |
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Synthetic Coordination Chemistry
7:00 PM-10:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster
Division of Inorganic Chemistry |